Set image tag and hub in build

Hi, the Arch Linux istioctl version references the wrong image in the generated manifests:

Official version

% ./istioctl manifest generate | grep 'image:.*pilot'
        image: docker.io/istio/pilot:1.24.3

Arch Linux Version

% istioctl manifest generate | grep 'image:.*pilot' 
        image: gcr.io/istio-testing/pilot:latest

Thus, it will install a different version into a cluster. While it is telling you, that it installs the version 1.24.2, the image version referenced in the manifests is: istio-testing/pilot:latest:

Arch Linux Version

% istioctl install --set profile=minimal            
        |\          
        | \         
        |  \        
        |   \       
      /||    \      
     / ||     \     
    /  ||      \    
   /   ||       \   
  /    ||        \  
 /     ||         \ 
/______||__________\
____________________
  \__       _____/  
     \_____/        

This will install the Istio 1.24.2 profile "minimal" into the cluster. Proceed? (y/N) y
✔ Istio core installed ⛵️                                                                                                                        
✔ Istiod installed 🧠                                                                                                                            
✔ Installation complete                                                                                                                          
% istioctl version                           
client version: 1.24.2
control plane version: 1.26-alpha.16216260bec43f46bbb24980047ed0c1514faef0
data plane version: 1.26-alpha.16216260bec43f46bbb24980047ed0c1514faef0 (1 proxies)

Official version

% curl -L https://istio.io/downloadIstio | sh -
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   102  100   102    0     0   2087      0 --:--:-- --:--:-- --:--:--  2125
100  5124  100  5124    0     0  21519      0 --:--:-- --:--:-- --:--:-- 21519

Downloading istio-1.24.3 from https://github.com/istio/istio/releases/download/1.24.3/istio-1.24.3-linux-amd64.tar.gz ...

Istio 1.24.3 download complete!

The Istio release archive has been downloaded to the istio-1.24.3 directory.

To configure the istioctl client tool for your workstation,
[...]
% cd istio-1.24.3/bin
% ./istioctl install --set profile=minimal
        |\          
        | \         
        |  \        
        |   \       
      /||    \      
     / ||     \     
    /  ||      \    
   /   ||       \   
  /    ||        \  
 /     ||         \ 
/______||__________\
____________________
  \__       _____/  
     \_____/        

This will install the Istio 1.24.3 profile "minimal" into the cluster. Proceed? (y/N) y
✔ Istio core installed ⛵️                                                                                                                        
✔ Istiod installed 🧠                                                                                                                            
✔ Installation complete                                                                                                                          
% ./istioctl version                           
client version: 1.24.3
control plane version: 1.24.3
data plane version: 1.24.3 (1 proxies), 1.26-alpha.16216260bec43f46bbb24980047ed0c1514faef0 (1 proxies)
% kubectl get pods -o yaml -n istio-system istiod-6c46dcf88d-87j77 | grep image 
    image: docker.io/istio/pilot:1.24.3
    imagePullPolicy: IfNotPresent
    image: docker.io/istio/pilot:1.24.3
    imageID: docker.io/istio/pilot@sha256:7ccda8c22307ee796cb7ba3f4ce224ef533c3c683c063dcc92fd5a244d8a5c9d